Merge pull request torvalds#146 from vamrs-feng/pr_some_change

Associate the mac address with the board.

Signed-off-by: Stephen Chen <stephen@radxa.com>

drivers/net/usb/smsc95xx.c

@@ -22,6 +22,10 @@
 #include <linux/phy.h>
 #include "smsc95xx.h"
 
+#if defined(__arm64__) || defined(__aarch64__)
+#include <asm/system_info.h>
+#endif
+
 #define SMSC_CHIPNAME			"smsc95xx"
 #define SMSC_DRIVER_VERSION		"2.0.0"
 #define HS_USB_PKT_SIZE			(512)
@@ -50,6 +54,7 @@
 #define SUSPEND_SUSPEND3		(0x08)
 #define SUSPEND_ALLMODES		(SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
 					 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
+#define MAC_ADDR_LEN                    (6)
 
 struct smsc95xx_priv {
 	u32 mac_cr;
@@ -68,6 +73,10 @@ static bool turbo_mode = true;
 module_param(turbo_mode, bool, 0644);
 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
 
+static char *macaddr = ":";
+module_param(macaddr, charp, 0);
+MODULE_PARM_DESC(macaddr, "MAC address");
+
 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
 					    u32 *data, int in_pm)
 {
@@ -766,6 +775,53 @@ static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 	return phy_mii_ioctl(netdev->phydev, rq, cmd);
 }
 
+/* Check the macaddr module parameter for a MAC address */
+static int smsc95xx_is_macaddr_param(struct usbnet *dev, u8 *dev_mac)
+{
+	int i, j, got_num, num;
+	u8 mtbl[MAC_ADDR_LEN];
+
+	if (macaddr[0] == ':')
+		return 0;
+
+	i = 0;
+	j = 0;
+	num = 0;
+	got_num = 0;
+	while (j < MAC_ADDR_LEN) {
+		if (macaddr[i] && macaddr[i] != ':') {
+			got_num++;
+			if ('0' <= macaddr[i] && macaddr[i] <= '9')
+				num = num * 16 + macaddr[i] - '0';
+			else if ('A' <= macaddr[i] && macaddr[i] <= 'F')
+				num = num * 16 + 10 + macaddr[i] - 'A';
+			else if ('a' <= macaddr[i] && macaddr[i] <= 'f')
+				num = num * 16 + 10 + macaddr[i] - 'a';
+			else
+				break;
+			i++;
+		} else if (got_num == 2) {
+			mtbl[j++] = (u8) num;
+			num = 0;
+			got_num = 0;
+			i++;
+		} else {
+			break;
+		}
+	}
+
+	if (j == MAC_ADDR_LEN) {
+		netif_dbg(dev, ifup, dev->net, "Overriding MAC address with: "
+			"%02x:%02x:%02x:%02x:%02x:%02x\n", mtbl[0], mtbl[1], mtbl[2],
+				mtbl[3], mtbl[4], mtbl[5]);
+		for (i = 0; i < MAC_ADDR_LEN; i++)
+				dev_mac[i] = mtbl[i];
+			return 1;
+	} else {
+		return 0;
+	}
+}
+
 static void smsc95xx_init_mac_address(struct usbnet *dev)
 {
 	/* maybe the boot loader passed the MAC address in devicetree */
@@ -788,6 +844,10 @@ static void smsc95xx_init_mac_address(struct usbnet *dev)
 		}
 	}
 
+	/* Check module parameters */
+	if (smsc95xx_is_macaddr_param(dev, dev->net->dev_addr))
+		return;
+
 	/* no useful static MAC address found. generate a random one */
 	eth_hw_addr_random(dev->net);
 	netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");